Q. 214.5( 6 Votes )

Soaps are prepared by treating the esters of fatty acid with alkali. Sometimes common salt is also added to it. Why is common salt added during this process?

Answer :

In the reaction of esters with alkali to prepare soap (saponification reaction), the product (soap) is obtained in a suspension form. To precipitate the soap out of the suspension form, common salt (NaCl) is added to it. This process is often referred to as “salting out” of soap.


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